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Efficacy of lumbosacral orthoses in the management of low back pain: biomechanical and clinical comparison of two designs. J Cholewicki , DC Morrisette , AS Lee, NP Reeves, GA Seif Michigan State University and Medical University of South Carolina, USA, cholewic@msu.edu. Jacek Cholewicki.
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Efficacy of lumbosacralorthoses in the management of low back pain: biomechanical and clinicalcomparison of two designs J Cholewicki, DC Morrisette, AS Lee, NP Reeves, GA Seif Michigan State University and Medical University of South Carolina, USA, cholewic@msu.edu
JacekCholewicki JacekCholewicki, co-director of Michigan State University's Center for Orthopedic Research at Ingham Regional Orthopedic Hospital in Lansing.
Objective • To compare the efficacy of an extensible (Mueller Adjustable Back Brace) and non-extensible (AspenQuikDraw Pro) lumbosacralorthoses (LSO) in augmenting trunk stiffness and improving physical function in patients with chronic low back pain (LBP).
Design • Trunk stiffness was estimated from the trunk's response to a quick force release in trunk flexion, extension, and lateral bending. Twenty subjects performed five trials in each experimental condition: (1) No LSO, (2) Mueller LSO, and (3) Aspen LSO. An additional 63 subjects were randomized to the same 3 treatment groups Iisted above.
Methodology • Subjects in the LSO conditions wore the LSOs daily. • The Oswestry Disability Index questionnaire was administered at baseline and at 2 to 3 weeks from starting treatment.
Results • On average, the Aspen LSO increased trunk stiffness by 14% (P<O.O 1), while the Mueller LSO did not result in any significant change in trunk stiffness. • Patients wearing the Aspen LSO demonstrated a 14% improvement in disability (P = 0.01) • while patients wearing Mueller LSO reported a 9% improvement in disability (P = 0.18).
Conclusion • A non-extensible LSO is more effective in augmenting trunk stiffness and in improving physical function in patients with chronic LBP when compared with an extensible LSO.